What was the main technical goal achieved by industrial chain development that belts could not guarantee?

Answer

Establishing a positive drive where output speed was directly proportional to input speed.

Industrial innovators sought a positive drive mechanism to eliminate slippage, ensuring that the speed of the driven machine accurately reflected the speed of the driving source, which belts could not reliably provide under high torque.

What was the main technical goal achieved by industrial chain development that belts could not guarantee?
inventionchainmechanismdrive